Community Water System · PWS WI2520199
Southern Wisconsin Center
Operator location Union Grove, Wisconsin - 23% of 293 violations are health-based (upper-third health share (> 23%)); groundwater source; 950 served per SDWIS.
- 950
- People served (this PWS)
- 293
- EPA violations (this PWS)
- 67
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Southern Wisconsin Center standing, high SDWIS violation third
23% of 293 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 23% is upper-third health share (> 23%). Population rank #20,465 of 29,740 among systems serving 500+.
The verdict
Southern Wisconsin Center sits in the upper third of the sitemap cohort by violation count (293), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (950; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 23% - most of this ledger is MCL or treatment-technique exceedance. No UCMR5 PFAS test appears for this system in this extract.
- #20,465 of 29,740
- Population · /systems
- #425 of 744
- Population · WI
- 293
- Total EPA violations on record
- 23%
- Health-based (MCL / treatment failure)
Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.
System Details
- System Type
- Community
- Owner Type
- State
- Connections
- 1
- County
- Racine
- School/Daycare
- No
- MCL Violations
- 65
- Monitoring Violations
- 205
- Treatment Tech Violations
- 2
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Combined Radium (-226 and -228) | MCL | 39 | 2001 |
| Gross Alpha, Excl. Radon and U | MCL | 26 | 2001 |
| Gross Alpha, Excl. Radon and U | MR | 24 | 2025 |
| Radium-228 | MR | 18 | 2025 |
| Consumer Confidence Rule | Other | 16 | 2022 |
| Radium-226 | MR | 15 | 2025 |
| Coliform (TCR) | MR | 14 | 2013 |
| Total Haloacetic Acids (HAA5) | MR | 12 | 2024 |
| TTHM | MR | 12 | 2024 |
| Revised Total Coliform Rule | MON | 11 | 2023 |
| Lead and Copper Rule | MR | 11 | 2021 |
| Chlorine | MR | 8 | 2020 |
| Combined Radium (-226 and -228) | MR | 7 | 2014 |
| Combined Uranium | MR | 6 | 2002 |
| Fluoride | MR | 4 | 2017 |
| 1,2,4-Trichlorobenzene | MR | 3 | 2014 |
| cis-1,2-Dichloroethylene | MR | 3 | 2014 |
| DICHLOROMETHANE | MR | 3 | 2014 |
| Vinyl chloride | MR | 3 | 2014 |
| 1,1-Dichloroethylene | MR | 3 | 2014 |
| 1,1,1-Trichloroethane | MR | 3 | 2014 |
| Ethylbenzene | MR | 3 | 2014 |
| Toluene | MR | 3 | 2014 |
| Benzene | MR | 3 | 2014 |
| CHLOROBENZENE | MR | 3 | 2014 |
| 1,1,2-Trichloroethane | MR | 3 | 2014 |
| 1,2-Dichloropropane | MR | 3 | 2014 |
| Carbon tetrachloride | MR | 3 | 2014 |
| o-Dichlorobenzene | MR | 3 | 2014 |
| Xylenes, Total | MR | 3 | 2014 |
Violation Count vs. the National Corpus
Southern Wisconsin Center has 293 recorded EPA violations, 91% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 9% carry more. 23% of this system's own violations are health-based (67 of 293), and it ranks #20,465 of 29,740 by population served among that same cohort.
EPA violations vs. the national water-system corpus
Public water systems serving 500+ people (EPA SDWIS)
293 Higher than most more violations than 91% of 29,740 water systems
the national water-system corpus, bucketed by value
Each bar is a band; taller bars hold more water systems. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source EPA SDWIS · 2026-05-15
Health-based violations on Southern Wisconsin Center
67 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for WI2520199.
Sources: EPA SDWIS · Wisconsin DNR, Drinking Water and Groundwater
Nationwide peers
293 violations · 950 served: nearest cross-state SDWIS matches.
Cross-state systems with comparable violation load
Nearest cross-state community systems (500+ served) by total SDWIS violations on record.
Cross-state systems with smaller service footprints
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Southern Wisconsin Center
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in Wisconsin compares on the same EPA violation measures. Wisconsin systems
- Check whether PFAS was detected at this system under UCMR5 testing. PFAS guide
- Find and compare another public water system by name or PWSID. Search systems
EPA SDWIS and UCMR5 figures are informational only, not a substitute for a certified lab test of your own tap water.